I ran into this rate limit recently when generating a logo in SVG. It's 45 messages per 5 hours (with some caveats). It's documented here [0].
[0] https://support.anthropic.com/en/articles/8324991-about-clau...
[0] https://support.anthropic.com/en/articles/8324991-about-clau...
Seems to also be limited by tokens. It’s still quite obscure.
> Please note that these limits may vary depending on Claude’s current capacity.
Fine for the free tier of course, but not great for the paid version.